MODEL 3386-XXXX PC 916 Motherboard Settings and Configuration

Processor	80386
Processor Speed	20MHz
Chip Set	Unidentified
Video Chip Set	None
Maximum Onboard Memory	2MB (on external memory card)
Maximum Video Memory	None
Cache	None
BIOS	Unidentified
Dimensions	Unidentified
I/O Options	External memory card, PS/2 mouse port
NPU Options	80387/3167

CONNECTIONS
Purpose	Location	Purpose	Location
PS/2 mouse port	CN1	Speaker	J4
External battery	J2	Auxiliary keyboard connector	J5
Keylock	J3
Note: The location of CN1 is unidentified.

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Power good signal source select power supply	JP1	Open
	Power good signal source select RC circuit	JP1	Closed
	DMA speed select 8MHz	JP2	Closed
	DMA speed select 4MHz	JP2	Open
»	Monitor type select color	SW1	On
	Monitor type select monochrome	SW1	Off
»	NPU not installed (if Weitek NPU is installed, set switch to off)	SW2/1	Off
	NPU installed	SW2/1	On
»	PS/2 mouse disabled	SW2/2	Off
	PS/2 mouse enabled	SW2/2	On
»	Video ROM copied to RAM	SW2/3	Off
	Video ROM not copied to RAM	SW2/3	On
»	Non maskable interrupt generated from fail safe timer disabled	SW2/4	Off
	Non maskable interrupt generated from fail safe timer enabled	SW2/4	On
»	IRQ10 disabled	SW2/5	Off
	IRQ10 enabled	SW2/5	On
»	IRQ11 disabled	SW2/6	Off
	IRQ11 enabled	SW2/6	On
»	IRQ12 disabled	SW2/7	Off
	IRQ12 enabled	SW2/7	On
Note: JP2 may not be present on all boards.

CPU SPEED SELECTION
Speed	SW2/8
8MHz (auto speed select)	Off
25MHz (high speed select)	On

USER CONFIGURABLE SETTINGS
Function		Label	Position
	Wait state select 0 wait states	J1/JP1	Pins 1 & 2 closed
	Wait state select 1 wait states	J1/JP1	Pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(36) 411000	None
2MB	(36) 411000	(36) 411000
Note: The location of banks 0 & 1 are unidentified.

DRAM JUMPER CONFIGURATION
Size	J2/JP2
1MB	Pins 2 & 3, 5 & 6, 8 & 9 closed
2MB	Pins 1 & 2, 4 & 5, 7 & 8 closed

DRAM SWITCH CONFIGURATION (ONE 2MB BOARD INSTALLED)
Setting	SW1/1	SW1/2	SW1/3	SW1/4	SW1/5	SW1/6	SW1/7	SW1/8
Set for first 2MB boundary	On	On	On	On	On	On	On	On
Setting	SW2/1	SW2/2	SW2/3	SW2/4	SW2/5	SW2/6	SW2/7	SW2/8
Locate 256KB at end of second MB of space.	On	Off	On	On	On	On	On	On

DRAM SWITCH CONFIGURATION (TWO 2MB BOARDS INSTALLED)
Setting	SW1/1	SW1/2	SW1/3	SW1/4	SW1/5	SW1/6	SW1/7	SW1/8
Set for first 2MB boundary (board 1)	On	On	On	On	On	On	On	On
Set for second 2MB boundary (board 2)	Off	On	On	On	On	On	On	Off
Setting	SW2/1	SW2/2	SW2/3	SW2/4	SW2/5	SW2/6	SW2/7	SW2/8
Locate 256KB at end of second MB of space. (board 1)	On	On	Off	On	On	On	On	On
Not the first MB in the system (board 2)	Off	Off	Off	Off	Off	Off	Off	Off

DRAM SWITCH CONFIGURATION (THREE 2MB BOARDS INSTALLED)
Setting	SW1/1	SW1/2	SW1/3	SW1/4	SW1/5	SW1/6	SW1/7	SW1/8
Set for first 2MB boundary (board 1)	On	On	On	On	On	On	On	On
Set for second 2MB boundary (board 2)	Off	On	On	On	On	On	On	Off
Set for third 2MB boundary (board 3)	On	Off	On	On	On	On	On	Off
Setting	SW2/1	SW2/2	SW2/3	SW2/4	SW2/5	SW2/6	SW2/7	SW2/8
Locate 256KB at end of sixth MB of space. (board 1)	On	Off	Off	On	On	On	On	On
All switches off (board 2)	Off	Off	Off	Off	Off	Off	Off	Off
All switches off (board 3)	Off	Off	Off	Off	Off	Off	Off	Off

DRAM SWITCH CONFIGURATION (FOUR 2MB BOARDS INSTALLED)
Setting	SW1/1	SW1/2	SW1/3	SW1/4	SW1/5	SW1/6	SW1/7	SW1/8
Set for first 2MB boundary (board 1)	On	On	On	On	On	On	On	On
Set for second 2MB boundary (board 2)	Off	On	On	On	On	On	On	Off
Set for third 2MB boundary (board 3)	On	Off	On	On	On	On	On	Off
Set for forth 2MB boundary (board 4)	Off	Off	On	On	On	On	On	Off
Setting	SW2/1	SW2/2	SW2/3	SW2/4	SW2/5	SW2/6	SW2/7	SW2/8
Locate 256KB at end of eighth MB of space. (board 1)	On	On	On	Off	On	On	On	On
All switches off (board 2)	Off	Off	Off	Off	Off	Off	Off	Off
All switches off (board 3)	Off	Off	Off	Off	Off	Off	Off	Off